Single vs. Double-Storey Extensions: Which is Best for Your Colchester Home?

Introduction

Expanding your home is an exciting prospect, but choosing between a single-storey home extension and a double-storey home extension can be challenging. As an experienced home builder in Colchester with over 20 years of expertise, I’ve helped countless homeowners navigate this decision.

In this guide, we’ll explore the pros and cons of each option, discuss cost implications, and provide insight into planning permissions specific to Colchester. By the end, you’ll have a clear understanding of which type of home extension is best suited to your needs.

What is a Single-Storey Home Extension?

A single-storey extension is a ground-floor addition that extends the existing footprint of your home. These home extensions are popular among Colchester homeowners looking to add extra space without major structural changes.

Common Uses for Single-Storey Extensions:

✔ Open-plan kitchen extensions – Ideal for creating a spacious and modern cooking and dining area.

✔ Additional living space – Perfect for larger lounges, playrooms, or home offices.

✔ Downstairs bedroom & bathroom – Great for accommodating elderly family members or guests.

Benefits of a Single-Storey Home Extension:

✅ Lower cost – Single-storey extensions are usually more affordable than double-storey extensions, making them a budget-friendly choice.

✅ Less disruption – The construction process is generally quicker and easier, meaning less disruption to your daily life.

✅ Greater design flexibility – You can incorporate features like skylights, bi-fold doors, and large windows to maximize natural light.

✅ No impact on upstairs rooms – A single-storey extension won’t require alterations to your existing roof or upper floor layout.

Considerations for a Single-Storey Home Extension:

🔹 Requires outdoor space – If you have a small garden, a single-storey extension could take up valuable outdoor space.

🔹 Planning permission – Some single-storey extensions fall under permitted development rights, but it’s crucial to check local Colchester planning regulations.

🔹 May not maximize value – While it adds space, a double-storey extension can sometimes add greater property value for a similar investment.

What is a Double-Storey Home Extension?

A double-storey home extension adds two floors of living space, effectively increasing the size and functionality of your home. This is a popular choice for homeowners in Colchester looking to maximize space without significantly increasing the footprint of their property.

Common Uses for Double-Storey Extensions:

✔ Extra bedrooms – A great way to accommodate a growing family or create a luxurious master suite.

✔ Additional bathrooms – Adding an en-suite or extra bathroom can improve convenience and increase resale value.

✔ Larger living and dining areas – Perfect for families needing more space for entertaining or relaxation.

Benefits of a Double-Storey Home Extension:

✅ Maximizes space – You get double the extra space compared to a single-storey extension.

✅ Better value for money – Although more expensive, the cost per square meter is often lower than a single-storey extension.

✅ Increases property value – A well-designed double-storey extension can significantly boost the value of your home.

✅ Doesn’t reduce garden size as much – Since it builds upwards instead of outwards, you can retain more outdoor space.

Considerations for a Double-Storey Home Extension:

🔹 Higher cost – While cost-effective per square meter, the overall expense is higher due to additional materials and labor.

🔹 Longer build time – A double-storey home extension takes longer to construct, leading to more disruption.

🔹 Planning permission required – Unlike some single-storey extensions, a double-storey extension always requires planning permission in Colchester.

🔹 Structural impact – Your home’s foundations must be strong enough to support a second storey, which may require reinforcement.

Cost Comparison: Single-Storey vs. Double-Storey Extensions

Cost is a major factor when deciding between a single-storey home extension and a double-storey home extension. While prices vary based on materials, design, and location, here’s a general cost breakdown:

Extension TypeAverage Cost (per sqm)Total Estimated Cost (30 sqm)Single-Storey£1,800 - £3,000£54,000 - £90,000Double-Storey£1,500 - £2,500£90,000 - £120,000

💡 Key Takeaways:

• A single-storey extension is cheaper overall but offers less space per pound spent.

• A double-storey extension provides better value per square meter but has higher upfront costs.

• The final cost depends on factors like materials, design complexity, and structural changes.

Planning Permission and Regulations in Colchester

Do You Need Planning Permission?

• Single-storey extensions may be allowed under permitted development rights, but this depends on factors such as size and location.

• Double-storey extensions always require planning permission from Colchester City Council.

Factors That Affect Planning Approval:

✔ Size & height restrictions – Extensions cannot exceed 50% of the original property size.

✔ Impact on neighbors – Overlooking and privacy concerns are taken into account.

✔ Conservation areas – Homes in protected areas face stricter regulations.

For more information, check Colchester Borough Council’s Planning Portal.

Choosing the Right Home Extension for Your Needs

Opt for a Single-Storey Extension if:

✔ You need extra space on a budget.

✔ You prefer a quicker, simpler build.

✔ You want more natural light and modern design flexibility.

Choose a Double-Storey Extension if:

✔ You need multiple new rooms (e.g., bedroom and bathroom).

✔ You want to add significant value to your home.

✔ You have a strong budget and can accommodate a longer build time.

Final Thoughts: Which Home Extension is Best for You?

A home extension is a fantastic way to increase space, enhance functionality, and boost property value. Whether you choose a single-storey home extension or a double-storey home extension depends on your budget, space availability, and long-term needs.

As an experienced home builder in Colchester, I’ve helped countless homeowners turn their home extension ideas into reality. If you’re considering an extension, contact us for a free consultation to discuss your options and get expert advice tailored to your home.